feat(admin): comprehensive functionality pass across admin apps (Codex review)

- Restore admin order creation (top blocker):
  - New createAdminOrder server action wrapping create_order_with_items RPC with proper getAdminUser + can_manage_orders + brand scoping.
  - AdminOrdersPanel now supports ?new=true with working modal form (customer, stop/ship, dynamic items with fulfillment/price/qty, live total).
  - Fixed dashboard "New Order" and "Create your first order" links; added /admin/orders/new redirect.
  - Success flow: toast + redirect to list.

- Product edit reliability and admin flows hardened.

- Form a11y + validation foundation (cross-cutting):
  - AdminInput now generates stable ids, sets htmlFor, forwards required/aria-required/aria-describedby to children.
  - All admin forms benefit (labels programmatic, required semantics real).

- Integrations: non-secret fields (email, name, phone for Resend/Twilio) no longer masked as password by default. Only isSecret fields use type=password + toggle.

- Advanced/AI settings pages now expose real content (cards + links to actual config) instead of pure redirects.

- Permission hardening example: water-log admin creates now enforce getAdminUser + can_manage_water_log + service key.

- Systematic coverage of admin "apps": orders, products, stops, communications, wholesale, water-log, time-tracking, route-trace, settings (billing/integrations/ai/apps/etc), import, users, reports, etc. via exploration + targeted fixes. Empty states, toasts, scoping, quick actions improved.

- Updated MEMORY.md with full pass summary, test instructions, and remaining items from Codex review.

Non-destructive focus during pass; used dev auth for verification. Core blockers from review now addressed for testing.

See session plan.md for detailed execution guide.

src/app/admin/advanced/page.tsx

@@ -1,9 +1,49 @@
 import { redirect } from "next/navigation";
 import { getAdminUser } from "@/lib/admin-permissions";
+import Link from "next/link";
 
 export default async function AdvancedSettingsPage() {
   const adminUser = await getAdminUser();
   if (!adminUser) redirect("/login");
 
-  redirect("/admin/settings#advanced");
-}
+  const isPlatform = adminUser.role === "platform_admin";
+
+  return (
+    <main className="min-h-screen px-6 py-10" style={{ backgroundColor: "var(--admin-bg)" }}>
+      <div className="mx-auto max-w-4xl">
+        <div className="mb-8">
+          <Link href="/admin/settings" className="text-sm text-stone-500 hover:text-stone-700">← Back to Settings</Link>
+          <h1 className="mt-2 text-3xl font-bold tracking-tight text-stone-950">Advanced Settings</h1>
+          <p className="mt-1 text-stone-600">Platform &amp; AI configuration, feature flags, and integrations.</p>
+        </div>
+
+        <div className="grid gap-4 md:grid-cols-2">
+          <Link href="/admin/settings/ai" className="block rounded-2xl border bg-white p-6 hover:shadow">
+            <div className="font-semibold">AI Intelligence Pack</div>
+            <div className="text-sm text-stone-500 mt-1">Provider keys, model preferences, and usage for campaign writer, pricing advisor, etc.</div>
+          </Link>
+          <Link href="/admin/settings/integrations" className="block rounded-2xl border bg-white p-6 hover:shadow">
+            <div className="font-semibold">Integrations</div>
+            <div className="text-sm text-stone-500 mt-1">Resend, Twilio, Stripe, Square, and custom AI providers.</div>
+          </Link>
+          <Link href="/admin/settings/square-sync" className="block rounded-2xl border bg-white p-6 hover:shadow">
+            <div className="font-semibold">Square Sync</div>
+            <div className="text-sm text-stone-500 mt-1">Inventory &amp; product sync configuration.</div>
+          </Link>
+          <Link href="/admin/settings/shipping" className="block rounded-2xl border bg-white p-6 hover:shadow">
+            <div className="font-semibold">Shipping &amp; FedEx</div>
+            <div className="text-sm text-stone-500 mt-1">Rates, label creation, and settings.</div>
+          </Link>
+        </div>
+
+        {!isPlatform && (
+          <p className="mt-8 text-xs text-stone-500">Some advanced options are only visible to platform administrators.</p>
+        )}
+
+        <div className="mt-8 text-xs text-stone-400">
+          These pages aggregate the real configuration surfaces. Feature flags live under Apps in the main settings.
+        </div>
+      </div>
+    </main>
+  );
+}